@merkur/cli/src/widgetServer.mjs

Merkur is tiny and extensible library for creating front-end microservices.

import { spawn } from 'node:child_process';
import process from 'node:process';

import chalk from 'chalk';

import { createLogger } from './logger.mjs';

export async function runWidgetServer({ merkurConfig, cliConfig, context }) {
  const logger = createLogger('widgetServer', cliConfig);
  const { watch, inspect } = cliConfig;
  const { playground, widgetServer } = merkurConfig;
  const { protocol, host, apiRoute } = widgetServer;
  const { widgetParamsDefault } = playground;

  const args = [`./server/server.js`];

  if (watch) {
    args.unshift(`--watch-path=./server/`);
    args.unshift(`--watch-path=./node_modules/`);
    args.unshift(`--watch-preserve-output`);
    args.unshift('--watch');
  }

  if (inspect) {
    args.unshift('--inspect');
  }

  if (watch) logger.debug('Starting widget server with watch mode.');
  const server = spawn('node', args, {
    env: {
      NODE_CONFIG_DIR: './server/config',
      NODE_WATCH: watch,
      ...process.env,
      MERKUR_CONFIG: JSON.stringify(merkurConfig),
      CLI_CONFIG: JSON.stringify(cliConfig),
    },
    stdio: cliConfig.silent || cliConfig.quiet ? 'pipe' : 'inherit',
  });

  const widgetServerUrl = new URL(apiRoute, `${protocol}//${host}`);
  widgetServerUrl.search = new URLSearchParams(widgetParamsDefault).toString();

  server.on('spawn', () => {
    logger.info(`Widget API endpoint: ${chalk.green(`${widgetServerUrl}`)}`);
  });

  context.process.widgetServer = server;
}